/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package br.com.sigodonto.view.servlet;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;

/**
 *
 * @author Fidelis
 */
public class GeraRelarorioServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        InputStream caminho = null;

        ServletOutputStream ouputStream = null;

        try {

            HttpSession session = request.getSession(true);

            //Recuperando os parâmetros enviados
            List colecao = (List) session.getAttribute("colecao");
            String relatorio = session.getAttribute("relatorio").toString();
            HashMap<String, Object> parameterMap = (HashMap<String, Object>) session.getAttribute("parametros");
            String redirecionar = session.getAttribute("redirecionar").toString();
            
            String reportPath = request.getServletContext().getRealPath("/resources/relatorios/"+ relatorio);

            caminho = GeraRelarorioServlet.class.getResourceAsStream(reportPath);
            

            JRDataSource jrds = new JRBeanCollectionDataSource(colecao);
            JasperPrint jasperPrint = JasperFillManager.fillReport(caminho, parameterMap, jrds);

            byte bytes[];

            response.setHeader("application/pdf", "Content-Type");
            response.setContentType("application/pdf");
            bytes = JasperExportManager.exportReportToPdf(jasperPrint);

            response.setContentLength(bytes.length);
            ouputStream = response.getOutputStream();
            ouputStream.write(bytes, 0, bytes.length);
            ouputStream.flush();
            
            response.sendRedirect(redirecionar);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {

            if (caminho != null) {
                caminho.close();
            }

            if (ouputStream != null) {
                ouputStream.close();
            }

        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
